Image via CrunchBaseQ: Is there a way to use Outlook with webmail, such as Mail.com?
A: Two ways
1) Pay for their "premium" service. Once you do, they'll give you the SMTP and POP3 addresses to their server, and your special login.
2) Use a POP3 emulator such as Freepops. You'll need to consult their homepage on configuration. I've used it and it DOES work, and often updated. Freepops is free, as the name suggests.